Ryan,
There are more possibilities.
On
some 429/460 2-bolt blocks, the main bearing web area extends out to the pan rail, is machined flat and has constant thickness. Others have a slight "dip" in that area, not fully machined, and with a bit thinner main bearing web. These second ones are the ones I believe Bill refers to above as "okay up to 600 HP".
Couldn't quickly find pix of these differences but they are obvious and should be familiar to any 385-series FoMoCo engine builder.
I DID find the following web site where you can buy aftermarket 4-bolt caps for the first type (thick main bearing web) of 2-bolt block and also the original blocks:
http://pro-gram.com/catalog/catalog....=program.setup
Have fun!
Tom
PS: Here's a site that has pix:
http://fordifiedracing.homestead.com/460tech.html
Note the SCJ has the flat rail. There ARE 2-bolt blocks having the flat, thick main webs for #2, #3 and #4 that can be drilled and tapped to accept the 4-bolt aftermarket caps. I don't know the clues to finding them offhand - sorry.
Also Moroso and others may sell the add-on "splayed" type caps...
Then again, I could be wrong - I can't remember whether I've made my mistake for this year or not!
